^start of line
Negative Lookahead(?!#\| label:) #the literal # (3510 / 438 / 2316)
\|the literal | (12410 / 1748 / 7C16)
label:the literal text label: (case sensitive) .+any character (except for line terminators), repeated at least once
(*SKIP)acts like (*PRUNE), but the next unanchored match attempt starts where (*SKIP) was reached instead of at the next subject character
(*F)forces the current match attempt to fail at this position